An error that relates to a character class
An error that relates to a character string
An error that is returned when a deprecated feature is used
A deprecation warning: Indicates that something shouldn’t be used anymore
An error message for a token that is invalid in a pomsky expression.
An error that relates to parsing a number
An error kind (without a span) than can occur only during parsing
A warning without a span pointing to the source of the warning
An error indicating an invalid repetition, e.g. x{4,2}